program crashes: is it my code or the chip?

[Acetronics2]

and What about this one, using the Button command ?

'*******************************************************************************
' Name : BUTTONTEST2.pbp
' Compiler : PICBASIC PRO Compiler 3.0
' Assembler : PM
' Target PIC : 8-pin PIC12F675 or similar type
' Hardware : Kee
' Oscillator : 4MHz internal
' Keywords : HIGH, LOW
' Description : use a push button to toggle two LEDs. THere are two push buttons.
'each push button toggles a separate set of LEDs. Program also debounces
'*******************************************************************************
#config 
    __CONFIG _CP_OFF & _WDT_ON & _BODEN_ON & _PWRTE_ON & _INTRC_OSC_NOCLKOUT & _MCLRE_OFF & _CPD_OFF
#endconfig

DEFINE OSCCAL_1K 1 ' PIC12F675, Calibrate internal oscillatordefine MCLRE_OFF
DEFINE BUTTON_PAUSE 255
Delay    VAR Byte
Button1 VAR GPIO.2
Button2 VAR GPIO.3
LED1    VAR GPIO.0 'Alias GPIO.0 to LED
LED2    VAR GPIO.1 'Alias GPIO.1 to LED2
LED3    VAR GPIO.4 'Alias GPIO.4 to LED3
LED4    VAR GPIO.5 'Alias GPIO.5 to LED4
CMCON = 7
ANSEL = 0
ADCON0 = 0
GPIO    = %00001100
TRISIO  = %00001100
CLEAR
'*******************************************************************************
Main:
'*******************************************************************************
WHILE 1
FIRST:' let's check Button1 ...
    Delay = 0
    button Button1, 0, 255, 0, Delay, 1,yes1
        no1:
        Pause 20 ; pace the scanning ... not compulsory
        goto Second
        yes1:
        toggle LED1    
        ' Stop until Button1 released
        WHILE !Button1 
        WEND
     
SECOND:' let's check Button2
    Delay = 0
    button Button2, 0, 255, 0, Delay, 1,yes2
        no2:
        Pause 20 ; pace the scanning ... not compulsory
        goto Update
        yes2:
        toggle LED3
        'Stop until Button2 released
        WHILE !Button2
        WEND
Update:        
led2 = ! LED1 : LED4 = !LED3
WEND
END

Alain